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Hitachi Computer Engineering Co., Ltd. Patents
Assignee:
Hitachi Computer Engineering Co., Ltd.
Address:
Kanagawa-ken, JP
No. of patents:
54
Patents:


1 2


Patent Number Title Of Patent Date Issued
6148415 Backup switching control system and method November 14, 2000
One or more combinations of an operating data processing machine and a backup data processing machine are connected together to enable backup switching wherein the backup machine takes over the data processing from the operating machine when a failure occurs in the operating machine. In
6014406 Frequency-hopped wireless communication system and mobile wireless terminal January 11, 2000
A frequency-hopped mobile communication system is disclosed, in which a mobile wireless station automatically becomes a base station in accordance with the surrounding conditions, thereby automatically reconfiguring a communication network. A control frame is generated by at least one ma
5982762 Wireless LAN system, base station device and wireless terminal device therefor, and method for r November 9, 1999
In a wireless LAN system, each wireless terminal device determines whether or not the wireless terminal device has entered into a wireless LAN domain established by a base station, and if it has entered, transmits an entry terminal identification information update control frame includin
5842042 Data transfer control method for controlling transfer of data through a buffer without causing t November 24, 1998
A data transfer control system in a data transfer apparatus including a plurality of data processing units having different data transfer speeds and a temporary holding circuit provided between the data processing units for temporarily holding data transferred between the data processing
5761435 Multiprocessor bridge having storage for spanning tree operation mode information indicating whe June 2, 1998
A multiprocessor bridge construction allows ports that are operable under a spanning tree protocol to coexist with ports that are inoperable under the spanning tree protocol, thus making it possible to improve the frame-repeating capability of the bridge, to equip the bridge with a large
5745972 Method of producing parts/substrate assemblies May 5, 1998
A system for producing parts/substrate assemblies each of which includes a substrate such as a ceramic substrate and a plurality of parts such as LSIs mounted on the substrate. After the LSIs for one lot of the production have been checked for excess or deficiency, etc. by a collating
5745444 Method of controlling recording information on an optical disk using replacement control informa April 28, 1998
Information is recorded on a rewritable optical disk apparatus in accordance with the second generation 5 inch rewritable-type optical disks standards that provide for reusing once-defective user blocks. Such disks have a user data recording region, a replacement recording region and a
5710903 Data processing system provided with an address translation lookaside buffer capable of quick pa January 20, 1998
A data processing system capable of simultaneously processing a plurality of partial purge requests stored in a purge address stack and of reducing the effective time necessary for carrying out a partial purge process for the partial purging of an address translation lookaside buffer is
5671354 Method of assisting server access by use of user authentication information held in one of serve September 23, 1997
User authentication information for network of a user and a name of a server to be accessed are sent from a client terminal to a user management equipment realized by one of servers which constitute a network system. The user management equipment sends the network address of that server
5638012 Write driver circuit June 10, 1997
A write driver for writing write data to a magnetic disk. The write driver is provided with first and second pnp type input transistors whose bases are each supplied with a pair of complementary input signals, and first and second npn type output transistor in the form of an inverted
5623607 Data transfer control method for controlling transfer of data through a buffer without causing t April 22, 1997
A data transfer control system in a data transfer apparatus including a plurality of data processing units having different data transfer speeds and a temporary holding circuit provided between the data processing units for temporarily holding data transferred between the data processing
5615316 Printing control method and apparatus March 25, 1997
A printing control method and apparatus for combining forms data and printing data to produce and output printing images. Forms data are handled as a group of forms data including a plurality of component data groups forming partial form elements and component placement information g
5603003 High speed file access control method and computer system including a plurality of storage subsy February 11, 1997
In a computer system having an interface with an I/O bus given disconnect/reconnect functions and a plurality of magnetic disk subsystems connected with the I/O bus, control divides a file at a disk access time with reference to disk management information, file management information
5548724 File server system and file access control method of the same August 20, 1996
A typical structure of a file server system is a file server system having a plurality of file servers connected in parallel on a network and sharing files placed distributedly in the file servers among a plurality of client computers, and there are provided in a specific file server amo
5543607 Self check-out system and POS system August 6, 1996
In a check-out system, in which a purchaser himself who intends to purchase commercial products performs a check-out processing, having a commercial product casted portion, a stocker for stocking the commercial products, a transport unit for transporting the commercial product from the c
5513427 System for producing parts/substrate assemblies May 7, 1996
A system for producing parts/substrate assemblies each of which includes a substrate such as a ceramic substrate and a plurality of parts such as LSIs mounted on the substrate. After the LSIs for one lot of the production have been checked for excess or deficiency, etc. by a collating
5497467 Vector data buffer and method of reading data items from a banked storage without changing the d March 5, 1996
A vector data processor includes a vector data buffer for receiving a plurality of arrayed data items requested from a storage including a plurality of storage banks (banks-0-3 in FIG. 2) for independent operations. The vector data buffer is constructed of a plurality of bank memorie
5432514 Method and apparatus for detecting abnormality in analog-to-digital converter July 11, 1995
A reference voltage for an analog-to-digital (A/D) converting unit is converted into plural digital values through the effect of the A/D converting unit. A difference between an average value of the digital values and an ideal reference value is derived. If the different is larger th
5386623 Process for manufacturing a multi-chip module February 7, 1995
A multi-chip module and a process for manufacturing the same comprises at least first and second semiconductor chips each formed with a plurality of semiconductor elements on their circuit forming surfaces and having different functions, mounted on a substrate. An insulating film is form
5373254 Method and apparatus for controlling phase of a system clock signal for switching the system clo December 13, 1994
A method and apparatus for controlling the phase of a system clock, in which one of a first clock signal and a second clock signal is selected and output to a system as a system clock signal, the first clock signal being generated by a frequency synthesizer synchronized with an external
5329690 Printed circuit board assembling system July 19, 1994
A method of supplying parts in a system for assembling a printed circuit board by mounting the parts on a substrate at corresponding predetermined positions thereof. One or more kinds of substrates and at least one group of parts, to be mounted on the corresponding substrates, are introd
5327535 Magnetic recording control apparatus July 5, 1994
A magnetic recording control apparatus includes conventional magnetic recording media, a large capacity type magnetic recording medium having a memory capacity corresponding to the sum of the capacities of a plurality of conventional magnetic recording media, recording unit for recording
5327425 Network synchronization control system and control method July 5, 1994
A Local Area Network (LAN) is disclosed in which each node includes means for receiving clock signal information from an external network, which may by way of example be another LAN or a wide area network (WAN), and for generating therefrom clock signals for each node of the local networ
5295251 Method of accessing multiple virtual address spaces and computer system March 15, 1994
A computer system operable as a virtual machine system capable of accessing multiple virtual address spaces, which has an access register translation means for translating a space identifier into an origin address of a table for address translation and a translation pair memory for stori
5274280 Semiconductor integrated circuit device having separate supply voltages for the logic stage and December 28, 1993
A semiconductor integrated circuit device has a plurality of emitter-coupled logic (ECL) gates. Separate power source wiring lines are provided for current switch circuits and emitter follower output circuits for the gates. The separate sets of power source wiring lines are respectiv
5268769 Image signal decoding system for decoding modified Huffman codes at high speeds December 7, 1993
An image signal decoding system for decoding a variable length image data compressed by a modified Huffman code. The decoding object data is cut by a fixed length of 13 bits and the cut data is decoded by using a decode-encode circuit for decoding the input of the modified Huffman code
5247695 Vector processor with byte access of memory September 21, 1993
A vector processor in which input/output of vector data to and from a vector register is effected by a load/store pipeline from a main memory, includes a load pipe for reading data of a plural-byte width from the main memory in one access, a plurality of vector registers for storing data
5231585 Computer-integrated manufacturing system and method July 27, 1993
A production management system for managing production by using a plurality of working devices arranged in the production processes includes a host management device for managing control data necessary for producing a product, working device managing terminals provided in correspondence
5226132 Multiple virtual addressing using/comparing translation pairs of addresses comprising a space ad July 6, 1993
Instead of translation from a space address to a segment table origin address (STO) by an ordinary instruction, translation to the STO is done by a space base register modify instruction which uses an instruction to modify the content of the space register, and the result thereof is used
5210844 System using selected logical processor identification based upon a select address for accessing May 11, 1993
An information processing apparatus having at least one processor and a main storage, accessed by the processor, and capable of providing a plurality of logical information processing apparatus by logically partitioning the information processing apparatus. The information processing
5210822 Storage control system for print image data May 11, 1993
A storage control system for a print image data in a print control apparatus includes a unit for generating a print image expressed by a set of a plurality of dots as a digital data having a dot carrying a two-dimensional address corresponding to a bit, an address conversion unit for
5202887 Access control method for shared duplex direct access storage device and computer system therefo April 13, 1993
Disclosed is a DASD access control method including storing information for identifying one data group in which an irrecoverable failure has occurred in the plurality of data groups stored in each of the first and second DASDs constituting the duplex DASD pair. A judgment is determined b
5191646 Display method in software development support system March 2, 1993
A display method in an information processing device for use in software development support includes the steps of analyzing a software product before change and a software product after change. Respectively forming structure information before change and structure information after
5172378 Error detection method and apparatus for processor having main storage December 15, 1992
In an information processor having a central processing unit, a main storage which is accessed by the central processing unit, and an input/output processing unit which controls transfer of information between the central processing unit as well as the main storage and exterior of th
5151868 Signal line terminal allocation method September 29, 1992
A signal line terminal allocation method includes an electronic device which is hierarchically designed to obtain terminal allocations which satisfy electrical restrictive conditions. The electronic device includes high hierarchial components and low hierarchial components; the high
5136709 Method for generating an operating system by a static link-editor August 4, 1992
In an operating system generation method of a computer, a symbolic name is converted into an identification code, which is further converted into an address. This enables an inter-reference operation to be achieved between a kernel and input/output device drivers, thereby independently g
5126935 POS system including use of expiration dates in commodity codes June 30, 1992
A POS terminal device which performs the function of a cash register upon input of a commodity code, with date and hour data included in the commodity code being checked at the time of data input and a caution indication that the term of validity has expired or the term of validity i
5099416 An operand storage compare (OSC) detecting device using column and row signals in a buffer stora March 24, 1992
A buffer storage controller includes a read-out buffer address array, a write-in buffer address array and a buffer storage. An operand storage compare (OSC) detecting section compares a column signal and a row signal outputted from the read-out buffer address array to the buffer storage
5091909 Method for writing/reading of data in magnetic disk subsystem February 25, 1992
When recording records into the IC memory group of a magnetic disk subsystem the records being composed of a count area of a fixed length, key area of a variable length and a data area of a variable length, data of a special format which is judged by ECC check to be an abnormal data is
5073970 Vector processing apparatus allowing succeeding vector instruction chain processing upon complet December 17, 1991
A vector processing apparatus includes a vector processing unit having a vector instruction decoder and a scalar processing unit including a scalar instruction decoder for activating the vector processing unit in response to a scalar instruction commanding initiation of the processing of
5060148 Control system for vector processor with serialization instruction for memory accesses for pipel October 22, 1991
An access instruction pipeline for receiving an access instruction for accessing data to be inputted to the pipeline of a vector processor includes a plurality of buffers for buffering a memory request and sending it to a storage control unit, and a detector for judging at the last stage
5010493 Load distribution method April 23, 1991
A load distribution method in which loads are divided into groups and each of a plurality of input pins of integrated circuits of a load is wired continuously with one stroke of a signal transmission line in a sequence from a driving output pin in each group when the wiring for distribut
5007005 Data processing system April 9, 1991
A data processing system capable of implementing at high speeds animating image generation processing and animating image display processing in synchronization with each other, thereby generating and displaying an animating image in a real time. The data processing system uses a given
4991083 Method and system for extending address space for vector processing February 5, 1991
A method and apparatus for extending an address space for a vector processor including a vector processing unit and a scalar processing unit. A main storage and an extended storage are also disclosed. An address translator is provided for each requestor within the vector processing u
4974145 Processor system including a paging processor for controlling paging between a main storage and November 27, 1990
A vector processor having a scalar procesing unit, a vector processing unit, a main storage unit, an extended storage unit, a storage control unit, and a paging processor unit, in which the storage control unit address translation for an access request from the vector processing unit
4964035 Vector processor capable of high-speed access to processing results from scalar processor October 16, 1990
A vector processing system having a main storage, a vector processor, a scalar processor, and an address translation mechanism in each processor in which data is stored in the main processor. The vector processing system includes a common memory in which processing results of vector data
4943912 Parallel processor system having control processor and array control apparatus for selectively a July 24, 1990
A parallel processor system comprises a main storage, a processor array control apparatus, a control processor which requests the processor array control apparatus to execute the processing in accordance with a procedure start instruction, and a plurality of processor elements each conta
4872167 Method for displaying program executing circumstances and an apparatus using the same October 3, 1989
Each program element of a desired program is converted into a corresponding graphic element and is displayed on a screen of a display, which enables a schema of the program to be visually displayed as graphics on the screen of the display. When the program is executed, the graphic elemen
4849882 Vector processing system for processing plural vector instruction streams July 18, 1989
A vector processor has a plurality of vector processing units each of which is connected to main storage via a plurality of memory port logic units. Each of the vector processing units has a resource management circuit, thereby managing its resources and the plurality of memory port logi
4803871 Inspection device for inspecting projections on the surface of parts February 14, 1989
An inspection device for inspecting projections of a part which can be applied to a variety of parts having projections on the surface thereof such as leads of electronic parts having varying shapes. The inspection device includes a member having a two-dimensional surface to which pr
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